Junkie taking cocaine given unlimited extra stuff (8)
I believe the answer is:
additive
'unlimited extra stuff' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'junkie taking cocaine given' is the wordplay.
'junkie' becomes 'addict' (I've seen this in another clue).
'taking' is a deletion indicator (take can mean remove or delete).
'cocaine' becomes 'C' (drugs abbreviation).
'given' becomes 'ive' (I can't justify this - if you can you should give a lot more credence to this answer).
'addict' with 'c' taken out is 'addit'.
'addit'+'ive'='ADDITIVE'
Can you help me to learn more?
(Other definitions for additive that I've seen before include "Colouring maybe" , "Flavour enhancer" , "Tie David up with added substance" , "Supplement" , "Something joined, to food say" .)